1 / 15

Design and Operation of a Bench Scale Continuous Flow Waste Water Treatment Plant

Design and Operation of a Bench Scale Continuous Flow Waste Water Treatment Plant. By: Stephen Mirabello and Allison Muehe. Contents. Objective Setup of Batch verses Continuous System Parameter Values Process Controller States Turbidity Turbidity Equations Results and Summary of Data

JasminFlorian
Download Presentation

Design and Operation of a Bench Scale Continuous Flow Waste Water Treatment Plant

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Design and Operation of a Bench Scale Continuous Flow Waste Water Treatment Plant By: Stephen Mirabello and Allison Muehe

  2. Contents • Objective • Setup of Batch verses Continuous System • Parameter Values • Process Controller States • Turbidity • Turbidity Equations • Results and Summary of Data • Notes • Performance Diagram • Conclusions and Suggestions

  3. Objective • Turn bench scale batch WWTP into a continuous flow WWTP • Of 4 conditions, find the system with the lowest turbidity measurement for the clarifier effluent

  4. Waste Batch System Tap Water Refrigerator Drain Air Flow Stirrer

  5. Peristaltic Pump Waste Continuous Flow System Tap Water Refrigerator Mixer On/Off Final Product Air Flow Centrifugal Pump Drain Stirrer Sludge Recycle On/Off

  6. Parameter Values

  7. Process Controller States • States for No Stirring in Clarifier • States for Stirring in Clarifier

  8. Turbidity • Definition • NTU, or Nephelometric Turbidity Units • A turbidimeter works by estimating how light is scattered by suspended particulate material in the water • Secchi Disk • Measurements • Trials • 7 vials: 1 standard of distilled water, 3 effluent samples, and 3 reactor samples • 4 trials: 3 measurements, 1 each day for 3 days • Steps to minimize variability • Process Controller States • With no Clarifier Mixing • During “Centrifugal Pump Off” state • At t = 300 seconds • With Clarifier Mixing • During “Centrifugal Pump Off” state • At t = 200 seconds • Data • the actual turbidity reading • percent of TSS removal

  9. Turbidity Equations

  10. Effluent Turbidity

  11. Percent Removal of TSS

  12. Summary of Data

  13. Notes • The percent removal and effluent graphs are not correlated. • Small changes in percent removal values. May be caused by measurement error and not actual differences in clarifier design. • Difficult to make conclusions due to variations in reactor turbidity • Also have to account sludge generation and balance

  14. Performance Diagram • Data could be accurate but in a different part of the graph • As Detention Time increases, approaches a value asymptotically • Curve also moves upward as TSS increases • TSS of our reactor was 960 – 1800 mg/L • This TSS correlates to a high removal rate

  15. Conclusions and Suggestions • Able to operate a continuous flow reactor • See how sludge recycle is affected by changing system parameters • Need to fix reactor TSS to obtain better results • Change clarifier depth to obtain more applicable results • Create a performance curve to create a reference for TSS and detention time

More Related